Continuum Mechanics and Thermodynamics最新文献_第6页

On the nonlinear dynamics of in-contact rigid bodies experiencing stick–slip and wear phenomena 论经历粘滑和磨损现象的接触刚体的非线性动力学

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-10-03 DOI: 10.1007/s00161-024-01331-2

Francesco D’Annibale, Arnaldo Casalotti

{"title":"On the nonlinear dynamics of in-contact rigid bodies experiencing stick–slip and wear phenomena","authors":"Francesco D’Annibale, Arnaldo Casalotti","doi":"10.1007/s00161-024-01331-2","DOIUrl":"10.1007/s00161-024-01331-2","url":null,"abstract":"<div><p>In this paper, the dynamic behavior of one degree-of-freedom oscillator subject to stick–slip and wear phenomena at the contact interface with a rigid substrate is investigated. The motion of the oscillator, induced by a harmonic excitation, depends on the tangential contact forces, exchanged with the rigid soil, which are modeled through piecewise nonlinear constitutive laws, accounting for stick–slip phenomena due to friction as well as wear due to abrasion, already developed by the authors in a previous work. The nonlinear ordinary differential equations governing the problem are derived, whose solution is numerically obtained via a typical Runge–Kutta-based algorithm. The main target of this study is to analyze and discuss the strong nonlinear behavior, descending from the presence of stick–slip and wear phenomena, thus investigating the effect of the different interface modeling. In this framework, the analysis is carried out considering the whole evolution of non-smooth contact laws, starting from the virgin interface.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 6","pages":"1815 - 1831"},"PeriodicalIF":1.9,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-024-01331-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142368828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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A qualitative analysis on the double porous thermoelastic bodies with microtemperature 微温双多孔热弹性体的定性分析

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-09-28 DOI: 10.1007/s00161-024-01330-3

O. A. Florea, E. M. Craciun, A. Öchsner, A. N. Emin

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Vibration analysis associated with the operation of printing units in offset printing machines: applications towards metamaterials 与胶版印刷机印刷单元运行有关的振动分析：超材料的应用

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-09-21 DOI: 10.1007/s00161-024-01329-w

Yuriy Pyr’yev, Larry Murcia Terranova

引用次数: 0

A semi-analytical approach for thermoelastic wave propagation in infinite solids subject to linear heat supply using two-phase lag theory 利用两相滞后理论研究线性供热条件下无限固体中热弹性波传播的半解析方法

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-09-16 DOI: 10.1007/s00161-024-01324-1

Ahmed E. Abouelregal, Fahad Alsharari, S. S. Alsaeed, Mohammed Aldandani, Hamid M. Sedighi

{"title":"A semi-analytical approach for thermoelastic wave propagation in infinite solids subject to linear heat supply using two-phase lag theory","authors":"Ahmed E. Abouelregal, Fahad Alsharari, S. S. Alsaeed, Mohammed Aldandani, Hamid M. Sedighi","doi":"10.1007/s00161-024-01324-1","DOIUrl":"10.1007/s00161-024-01324-1","url":null,"abstract":"<div><p>This study examines how heat travels as thermoelastic waves in a uniform, isotropic, and infinitely large solid material due to a constant line heat source. We leverage the theory of thermoelasticity with two phase lags to account for the time difference between temperature changes and the material’s stress response. By employing a potential function approach alongside Laplace and Hankel transforms, we can convert the governing equations into more manageable domains. This enables us to derive mathematical formulas for temperature, displacement, and stress distributions within the solid. Through a complex inversion process of the Laplace transforms, we obtain analytical formulas for these field distributions. These formulas, however, are only valid for short time periods and are most applicable in the initial stages of wave propagation. We then use these analytical formulas to visualize how temperature, displacement, and stress are distributed, revealing the influence of the heat source and phase lag parameters on these fields. This approach provides valuable insights into the characteristics of wave propagation, the heat source’s impact, and the time-dependent nature of the thermoelastic response. Furthermore, to demonstrate the method’s versatility and ability to connect with established theories, we incorporate specific examples from other thermoelasticity theories. This broadens our understanding of thermoelastic behavior under various conditions.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 6","pages":"1711 - 1728"},"PeriodicalIF":1.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142235251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Complex mechanical properties of 3D micro-metric pantographic metamaterials fabricated by two-photon polymerization 利用双光子聚合技术制造的三维微米泛影超材料的复杂力学特性

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-09-16 DOI: 10.1007/s00161-024-01327-y

Emilio Barchiesi, Stefanos Mavrikos, Ivan Giorgio, Costas Grigoropoulos, Maria Farsari, Francesco dell’Isola, Gordon Zyla

{"title":"Complex mechanical properties of 3D micro-metric pantographic metamaterials fabricated by two-photon polymerization","authors":"Emilio Barchiesi, Stefanos Mavrikos, Ivan Giorgio, Costas Grigoropoulos, Maria Farsari, Francesco dell’Isola, Gordon Zyla","doi":"10.1007/s00161-024-01327-y","DOIUrl":"10.1007/s00161-024-01327-y","url":null,"abstract":"<div><p>Mechanical metamaterials consist of specially engineered features designed to tailor and enhance the mechanical properties of their constituent materials. In this context, 2D pantographic fabrics have gained attention for their unique deformation behavior, providing remarkable resilience and damage tolerance. This study explores micro-metric metamaterials with 3D pantographic motifs, aiming to transfer these properties to small scales. 3D micro-metric structures were designed using 2D pantographic fabrics arranged in multiple layers, each featuring unit cells with quasi-perfect pivots. Relatively large specimens of 3D micro-metric pantographs, measuring 158 <span>(upmu )</span>m x 250 <span>(upmu )</span>m x 450 <span>(upmu )</span>m, were fabricated in various configurations using two-photon polymerization. These specimens were mechanically characterized through in-situ scanning electron microscopy microindentation under conditions of cyclic deformation. Structural failures were subsequently assessed via helium-ion microscopy. The 3D micro-metric pantographs exhibited complex mechanical properties, some aligning with those of 2D pantographic fabrics, while new properties, such as a dissipative response and softening, were identified. Nonetheless, the 3D micro-metric pantographs demonstrated great resilience against deformation and enhanced resistance to undesired out-of-plane motions, indicating their potential for novel applications in advanced engineering fields. Additionally, the findings can potentially lead to optimizing and enriching theoretical models describing the mechanical behavior of pantographic metamaterials.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 6","pages":"1755 - 1766"},"PeriodicalIF":1.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142234194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the influence of microproperties of elastoplastic hinges on the global behavior of pantographic sheets in bias extensional test 弹性铰链的微观特性对受压板在偏置拉伸试验中的整体行为的影响

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-09-10 DOI: 10.1007/s00161-024-01325-0

G. La Valle, F. Fabbrocino, B. Desmorat

引用次数: 0

Multiscale investigation of debonding behavior in anisotropic graphene–polyethylene metamaterial nanocomposites 各向异性石墨烯-聚乙烯超材料纳米复合材料脱粘行为的多尺度研究

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-09-09 DOI: 10.1007/s00161-024-01328-x

M. Safaei, M. R. Karimi, D. Pourbandari, M. Baghani, D. George, M. Baniassadi

{"title":"Multiscale investigation of debonding behavior in anisotropic graphene–polyethylene metamaterial nanocomposites","authors":"M. Safaei, M. R. Karimi, D. Pourbandari, M. Baghani, D. George, M. Baniassadi","doi":"10.1007/s00161-024-01328-x","DOIUrl":"10.1007/s00161-024-01328-x","url":null,"abstract":"<div><p>The first phase of this study aimed to validate multi-scale approaches based on Representative Volume Elements (RVEs) for graphene–polyethylene nanocomposites.\u0000 stress–strain curves of experimental results were compared with numerical homogenization results. The stress amplification obtained from these simulations was used to predict GNP aspect ratios, demonstrating good agreement with permeability results. After validation of the multiscale approach, this study investigates the adhesion between nanoparticles and matrix in anisotropic GNP-HDPE metamaterial nanocomposites, emphasizing the role of the carboxyl (COOH) functional group in improving adhesion. The RVE model is used to investigate the debonding initiation and progression in these anisotropic nanocomposites under tensile and shear loading. Results indicate a variance in debonding onset and growth depending on orientation relative to the GNP axis. In tensile loading, debonding initiates at higher strains along the GNP axis than perpendicularly. Under shear loading within an anisotropic distribution, debonding behaviour varies significantly between planes perpendicular and parallel to the GNP axis. GNP surfaces with fully debonded surfaces slightly exceed 0.6% perpendicular to the GNP axis but increase to over 10.5% parallel to it.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 6","pages":"1767 - 1785"},"PeriodicalIF":1.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multi-scale homogenization framework for design and strain-gradient modeling of additively manufactured parts fabricated by particulate composites 用于微粒复合材料快速成型部件设计和应变梯度建模的多尺度均质化框架

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-08-29 DOI: 10.1007/s00161-024-01320-5

B. Cagri Sarar, M. Erden Yildizdag, B. Emek Abali

{"title":"A multi-scale homogenization framework for design and strain-gradient modeling of additively manufactured parts fabricated by particulate composites","authors":"B. Cagri Sarar, M. Erden Yildizdag, B. Emek Abali","doi":"10.1007/s00161-024-01320-5","DOIUrl":"10.1007/s00161-024-01320-5","url":null,"abstract":"<div><p>Classical homogenization approaches applied to heterogeneous materials are suitable for the cases where a scale-separation is eminent. As the length-scale at the effective continuum reaches the length-scale of the microstructure of the material, classical homogenization approaches fail to be accurate. In such cases, higher-gradient theories may be stimulated for multi-scale material modeling of complex structures in terms of geometry and material. In this study, a multi-scale homogenization framework is presented for additively manufactured (3-D printed) composite parts with specific infill design. The overall framework consists of two major steps, namely micro-to-material and material-to-structure homogenization. In both steps, an asymptotic homogenization procedure is applied to determine constitutive parameters. In the micro-to-material homogenization, the constitutive parameters of the composite material are first determined regarding the material composition. Then, in the material-to-structure homogenization, the constitutive parameters are obtained regarding the infill design of the additively manufactured part. The developed two-step homogenization framework is applied for an off-the-shelf composite material commonly used in 3-D printers. Specifically, in this study, composite parts printed with grid infills are investigated numerically considering different infill ratios.\u0000</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 6","pages":"1629 - 1643"},"PeriodicalIF":1.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142090067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exact hydrodynamic manifolds for the linear Boltzmann BGK equation I: spectral theory 线性玻尔兹曼 BGK 方程的精确流体力学流形 I：频谱理论

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-08-18 DOI: 10.1007/s00161-024-01323-2

Florian Kogelbauer, Ilya Karlin

引用次数: 0

Wave solutions in nonlocal integral beams 非局部积分波束中的波解

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-08-16 DOI: 10.1007/s00161-024-01319-y

Raffaele Barretta, Annalisa Iuorio, Raimondo Luciano, Marzia Sara Vaccaro

{"title":"Wave solutions in nonlocal integral beams","authors":"Raffaele Barretta, Annalisa Iuorio, Raimondo Luciano, Marzia Sara Vaccaro","doi":"10.1007/s00161-024-01319-y","DOIUrl":"10.1007/s00161-024-01319-y","url":null,"abstract":"<div><p>Wave propagation in slender beams is addressed in the framework of nonlocal continuum mechanics. The elastodynamic problem is formulated exploiting consistent methodologies of pure integral, mixture and nonlocal strain gradient elasticity. Relevant wave solutions are analytically provided, with peculiar attention to reflection and near field phenomena occurring in presence of boundaries. Notably, the solution field is got as superimposition of incident, reflected, primary near field and secondary near field waves. The latter contribution represents a further effect due to the size dependent mechanical behaviour. Limit responses for vanishing nonlocal parameter are analytically evaluated, consistently showing a zero amplitude of the secondary near field wave. Parametric analyses are carried out to show how length scale parameter, amplitude of incident wave and geometric and elastic properties of the beam affect the amplitudes of reflected, primary near field and secondary near field waves. The results obtained exploiting different nonlocal integral elasticity approaches are compared and discussed.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 6","pages":"1607 - 1627"},"PeriodicalIF":1.9,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-024-01319-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141994369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0